2018 Multi-University, HDU Day 9

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Revision as of 11:30, 20 August 2018 by Zerol (talk | contribs) (→‎Problem A)
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两个半小时签完到,最后两个 Last Hour。人生大起大落真刺激。

Problem A

Solved by zerol & kblack. 02:33 (+)

题意:在 n×m 的方格中填 1~nm 的数,使得只有一个数是它所在行列的最大值。

题解:显然那唯一一个数就是 nm。考虑从大到小依次填数,每个数肯定得填在一个之前填过的数的同一行或者同一列。


无比艰难的签到。

Problem B

Solved by kblack. 04:43 (+3)

Problem D

Solved by kblack. 01:29 (+1)

Problem J

Solved by ultmaster. 04:44 (+2)

Problem K

Solved by zerol. 00:47 (+)